I have a 4 x 4 2005 Crew Cab with the 5.3L automatic and I have the service 4wd light on. I have 72,000 miles on the truck and it drives fine. I noticed one day it did shift in 4 wheel drive on it's own which I caught quickly. Do I need to run the code on it and see if I have a bad TCCM or encoder motor or should I look elsewhere?
I just retired and wanted to catch up on the servicing of my truck. I wanted to replace the front & rear diff oil, the transfer case oil and the automatic transmission filter/fluid. Can I use Advance auto parts lubricants in all these gear boxes? I want to insure they have all the correct additives. Does anyone have the capacities or point me to a site which has one stop shopping for this info? All help would be greatly appreciated.
The last eight of my VIN is 51179725 for the TECHS who know the different model configurations.
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